Currently, Mr. Huang is in charge of coin department at EPAMA Auction House at Shanghai. He also makes many appearances at investment talk shows. As coin collector, I will consider his book as one of the source of information, but definitely not the only source. There are many books in the market. The books mentioned in the following thread are good source of information.

Congratulations again on owning the top ranking medal. Huang Ruiyong is one of the top MCC collectors, but his lists are based on the criteria he lists in his book. There were some controversies on some coins at the auctions that he managed, but he has not been known to hoard coins ranking high on his lists. Top ranking coins/medals are difficult to hoard anyway because of their high price and rarity. The person known to own 97% of all MCC coins (excluding medals) is King Chan in Hong Kong.

Thank you fwang. I haven't received it back yet (FedEx still has it) but I learned that it was authenticated by NGC as real and graded of course.